The man filed a complaint with the USF Police Department on Friday, saying another man raped him on the afternoon of Jan. 18 in the second-floor public restroom at the Marshall Student Center, the building where students go to eat, study and shop for books.

The men knew each other and are affiliated with the university but are not students, said Police Department spokeswoman Charlotte Domingo.

She wouldn't elaborate because the investigation is ongoing. Police have not made any arrests.

The Marshall Center has cameras in main areas, but Domingo said any information from them is part of the open investigation. Anyone can watch real-time footage from cameras in the Marshall Center's atrium and plaza on the center's website.

This is the first campus rape report of the year.

In late 2012, two rapes were reported in less than a month in coed freshman dormitories.

No arrests have been made in those incidents, police said.

News of the rape reports in late 2012 caused students to take extra precautions on campus, doubling up as they walked to class at night, putting away cellphones and looking over their shoulders.

Two other cases of rape were reported in the spring semester of 2012. One was reported in 2011 and seven in 2010, police said.

Experts say reports of rape don't necessarily mean an increase in the act. Many rapes go unreported each year.

Anyone with information on the incident in the Marshall Center is asked to call (813) 974-2628.